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a fost răspuns

REZOLVATI 2+4+6+8+.....+200=
5+10+15+20+....+200=
4+8+12+....116 VA ROOOG IMI TREBUIE PANA MAINE DAU COROANA

Răspuns :

CosmoteRo
2+4+6+8+..+200=2(1+2+3+4+...+100)=2(101x100:2)=2x5050=10100

5+10+15+20+...+200=5(1+2+3+4+...+40)=5x(41x40:2)=5x820=4100

4+8+12+...+116=4(1+2+3+..+29)=4x(30x29:2)=4x435=1740